I'm using QNX 7.1 on a Zynq Ultrascale+.

The SDCard has been formatted on a PC with FAT32 and contains boot.bin and qnx-ifs (the boot and OS images).

I'm trying to initialise and mount the card as follows:

devb-sdmmc-xzynq cam quiet sdio addr=0xxxx, irq=xxx blk ramdisk=64
waitfor /dev/hd0
mount -v -t dos exe=all /dev/hd0t12 /appli

I am able to read the content of the SDcard in /appli but when I try to write it I've got a message read-only file system. A ls -l indeed shows that /dev/hd0 is read-only but /appli is read-write.

I tried to add options to io-blk driver like this:

devb-sdmmc-xzynq cam quiet sdio addr=0xFF160000,irq=80 blk rw,perms,0777,ramdisk=64

but it doesn't change.

Any idea ?